Print roll



June 24, 1941. J M, @Umm 2,246,976

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v /dr/ A If/a Patented June 24, 1941 Joseph M. Goulding, Fairhaven,Mass., assignorto Revere Copper andBrass Incorporated, New York, N; Y.,a corporation of Maryland Application Jury 1;.1938, semi Nb. 217,048claim. (01.'101-37'5) My invention' relates to rolls and methodsofmaking the same, and is particularlyconcerned with building up .a wornprint roll' such as.VV for example, is used! for printing textiles.

The inventionwilli be best-understood from the followingdescriptionsof'embodiments'of a print rolllaccording to theinvention-and a method of making the sameaccordng to the invention, thescopelof tl'ieiv invention being more particularlyI pointed out in theappended claims.

In theV dra-wing- Fig. 1 is a longitudinal section of a partiallycompleted print roll according to the invention in the process of beingformed, with associated mechanism for forming it;

Fig. 2 is a more or less schematic View illustrating a step in theprocess of forming the print roll;

Fig. 3 is a section on the line 3-3 of Fig. 1; and

Fig. 4 is a section on the line 4--4 of Fig. 2 on an enlarged scale.

Print rolls of the character described are commonly formed of anelongated sleeve of copper or copper alloy mounted on a supporting shaftor mandrel. The cylindrical surface of the roll is etched with thedesired pattern to be printed on the textile or other web. In practicefrom time to time, either on account of wear or for the purpose ofsubstituting a new pattern, the cylinder is turned clown and newpatterns are etched upon it. This results in the print roll in timebeing so reduced in diameter that it must be replaced with a new roll.Commonly the internal bore I of the sleeve 3 constituting the roll,which latter is indicated as a worn roll in Fig. 2, is slightly taperedfor making a proper nt with the mandrel or print roll shaft 5 receivedby that bore, the sleeve being formed With an integral key 'l tting akeyway 9 in the shaft.

According to the present invention the worn sleeve 3 is built up byplacing over it a second sleeve II (Fig. 1) of preferably the samematerial, and pressing it into intimate contact with the Worn sleeve I3,say by forcing the two sleeves through the opening of a stationary dieI3. Preferably the mandrel 5 is Within the sleeve 3 during thisoperation so as to prevent any possibility of the bore I being deformedor having its diameter reduced. As shown, the print roll is forcedthrough the die by use of a hydraulic ram, the reciprocating head ofwhich is indicated at I5. Conveniently a suitable spacing sleeve I'l, ofexterior diameter not greater than that of the die opening, is removablymounted on the adjacentprojecting end of the shaft'to. transmit theeffortof theram to both sleeves.

vAccording to the` invention, spacedlbonding parts are interposedbetween the two sleeves before'they are drawn or the outersleeve'otherwise pressed into'contact withthe inner sleeve. Thesebonding parts vpreferably arel vangularly disposed to the adjacentsurfacesfo-f the-.sleevesso asto bondfthe sleeveslltogetherV againstboth relative longitudinal and.' relative circumferential Inove-4 ment.As illustrated in the drawing', thisbon'ding means is in the form of awire I9, the several turns of the Wire constituting the spaced angularlydisposed bonding parts. When the sleeves are forced through the die 3 topress their adjacent surfaces into contact the wire will be embedded inboth surfaces to lock the sleeves against relative longitudinal andcircumferential movement.

Preferably the wire is wrapped about the sleeve 3, either in one lengthor in sections, before the sleeve II is placed over it. For preventingany possibility of the sleeve 3 tending to screw off the sleeve I I whenthe parts are in use under the enormous pressures commonly used inprinting textiles as, for example, to 100 tons pressure between therolls of the pair constituting the printing couple, the Wire preferablyis irregularly Wrapped about the sleeve 3. For example, several closelyspaced turns 2| may be made at the center portion of the sleeve so as toinsure that the turns 23 at one end portionr of the sleeve arepositioned relative to the turns 23 at the opposite end portion in -suchWay that they are not part of the same helix. 'Ihe ends of the wire,and, if desired, points along the Wire, may be secured to the sleeve 3in any suitable manner as, for example, by brazing or Welding.Preferably, however, drilled holes 25 are made in the sleeve 3, and theend of the Wire I9 bent at right angles, as indicated at 2'l (Fig. v4),and linserted in these holes.

The wire or other bonding means employed preferably is somewhat harderthan the material of the sleeves. For example, but Without limitationthereto, with sleeves having a scleroscope hardness of 10 to 12excellent results will be secured With a wire having a scleroscopehardness of 17 to 18, the wire being about 3-35 in diameter. The wireusually may be of copper or brass, or,

Where the sleeves are of relatively hard copper-v base alloy such as asilicon bronze, may be of steel of requisite hardness.

It will be understood that Within the scope of the appended claims Widedeviations may be made from the forms of the invention described withoutdeparting from the spirit of the invention.

I claim:

1. A cylindrical print roll comprising an outer sleeve adapted forcontact with the work, an inner sleeve for supporting said outer sleeve,which sleeves have closely fitting, contacting surfaces circular incross-section; and means for positively interlocking said sleevesagainst relative axial and rotative movements comprising spaced partsseparate from the sleeves and positioned' between them and respectivelyrelatively deeply4 embedded in both.

2. A cylindrical print roll comprising an outer sleeve adapted forcontact with the Work, an inner sleeve for supporting said outer sleeve,which sleeves have closely tting, contacting surfaces circular incross-section; and means vfor positively interlocking said sleevesagainst relative axial androtative movements comprising 'elongated,angularly disposed bonding parts separate from the sleeves andpositioned between them and respectively relativelydeeply embedded inboth, which parts are relatively narrow and relatively widely spaced tocause the inner sleeve to contact with and directly support the outersleeve without material interruption.

3. A print roll according to claim 2 in ywhich the elongated, relativelynarrow bonding parts are formed of bent wire.

4. A cylindrical print roll comprising an outer sleeve adapted forcontact with the work, an inner sleeve for supporting said outer sleeve,which sleeves have closely fitting, contacting surfaces circular incross-section; and, between said sleeves and relatively deeply embeddedin both, a coiled wire having its adjacent turns predominantly inrelatively widelyspaced, non-contacting relation to cause the innersleeve to contact with and directly support the outer sleeve betweensuch adjacent turns, the Wire being nonuniformly coiled so as positivelyto interlock said sleeves against relative rotative movement as well lasrelative axial movement.

5. A cylindrical print roll comprising an outer sleeve adapted forcontact with the Work, an inner sleeve for supporting said outer sleeve,which sleeves have closely fitting, contacting surfaces circular incross-section; and, between said sleeves and relatively deeply embeddedin both, a coiled wire, of circular cross-section and of harder materialthan that of each of said sleeves, having adjacent turns predominantlyin relatively Widely spaced, non-contacting relation to cause the innersleeve to contact with and directly support the outer sleeve betweensuch adjacent turns, the Wire being non-uniformly coiled so aspositively to interlock said sleeves against relative rotative movementaswell as relative axial movement. .l f

JOSEPH M. GOULDING.

